A 35-year-old man comes to the physician because of a 3-week history of excessive thirst and frequent urination. Physical examination shows dehydration. BMI is 20. Fasting laboratory studies show:
Serum glucose 94 mg/dL
Serum ADH (vasopressin) High
Serum osmolality High
Urine osmolality Low
Which of the following is the most appropriate pharmacologic therapy for this patient?
Acetazolamide
Desmopressin
Ethacrynic acid
Hydrochlorothiazide
Spironolactone
